6Whether they fly, swim, or walk, every year billions of animals travel from one part of our planet to another. Meet these masters of migration, and follow their incredible journeys in this beautiful, fact-filled nonfiction picture book by BBC wildlife expert Chris Packham. From whales and wildebeest to butterflies and bats, you can discover each of their stories, pore over the map to see their migration routes, and uncover extra information in the "Find Out More" section.